termux-tools: do not provide file path with slash at the beginning

See https://github.com/termux/termux-app/issues/995.

packages/termux-tools/build.sh

@@ -1,7 +1,7 @@
 TERMUX_PKG_HOMEPAGE=https://termux.com/
 TERMUX_PKG_DESCRIPTION="Basic system tools for Termux"
 TERMUX_PKG_LICENSE="GPL-3.0"
-TERMUX_PKG_VERSION=0.59
+TERMUX_PKG_VERSION=0.60
 TERMUX_PKG_PLATFORM_INDEPENDENT=yes
 TERMUX_PKG_ESSENTIAL=yes
 TERMUX_PKG_DEPENDS="termux-am"

packages/termux-tools/termux-open

@@ -40,6 +40,9 @@ if [ -f "$FILE" ]; then
 	FILE=`realpath "$FILE"`
 fi
 
+# Fix for issues on Android 8.1.
+FILE=$(echo "$FILE" | sed 's/^\///')
+
 am broadcast --user 0 \
 	-a $ACTION \
 	-n com.termux/com.termux.app.TermuxOpenReceiver \